Lock-gage.



G. LEEWORTH.

LOCK GAGE.

APPLICATION FILED MAY 1a, 1914.

Patented 00E. 27, 1914.

B1 I1 M, A W miv GEORGE LEEWORTI-I, OF CHICAGO, ILLINOIS.

nocreenen.

Specification of Letters Patent.

Patented Get. 27, 191.41.

Application and May 1e, 1914. serial N0. 839,527.

To all whom t may concern.'

Be it known that I, GEoncnLnnWonTH, a citizen of the United States of America, and a resident of Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Lock-Gages, of which the followingis a specification. j This invention relates to that class of gages employed in making the position of the key-holes and knob-shank orifices on the doors of houses and like structuresn And the `present improvement has for its object to provide a simple and efficient structural lformation and combination of parts in a gage adapted to afford a ready and accurate adjustment of parts to suit sizes and makes of door locks, and which in addition provides means for accurately making the position ofthe mortise for the lock casing with relation to the key-hole and knob-shank hole markings on the sides of the` door, all` as will hereinafter more fully appear.

In the accompanying drawings z-Figurc 1, is a side elevation, with parts broken away and withparts in section, of a lock-gage embodying the present invention. Fig. 2, is a rear elevation of the same. Fig. 8, is a front elevation` of the same.`

Similar reference numerals indicate like parts in the several views.

Referring to the drawings, 1 and 2 represent the respective main sections or members of the gage, which are slidingly connected togther in any usual and suitable manner, preferably by means of a flat tongue 3 on one member, sliding ,sin a correspondingly formed guide groove 4f in the companion member, as shown in Fig. 1.`

5 is an adjusting screw-shaft journaled in the member 1, and having screw-threaded engagement with anut formation 6 in the other member 2, so that by its rotationthe two members can be adjusted in relation to each other, as required.

7 is a gage plate overlapping the front end of the member 1 and secured thereto in a laterally adjustable manner by guide lugs 8, elongated slots 9 and clampingscrews 10. Theiback of said plate 7 is preferably provided With top and bottom scales 11 so that said plate may be accurately set with relation to the sides of member 1, and alter'- nately to one side and the other of the same, and its vertical edges used as a guide for a pencil or a scribe in marking the position of the lock-mortise in the edge of a door;

1Q is a pair of heads adapted to move in vertical guide recesses 13, in the member 2, and carrying prick pins l-l on their respective sides for effecting markings in the door corresponding with the key-hole and knobshank orifice which are to be formed in the door. Each head 12 is provided with a screw-threaded shank 15 which is engaged by an individual thumb-nut 16 journalcd in the member Q by an annular collar on said nut turning in a complementary recess formed therefor in the member' 2, as shown in Fig. 1, so that by a manual rotation of said nuts, the prick pins 14 can be adjusted to the proper points corresponding with the centers of the key-hole and knob-shank opening of the lock ease intended to be placed in the particular door. The member `or section 2 aforesaid,`is preferably formed 11n two plate shaped portionsor halves secured together by screws or other usual fastening means, as illustrated in Figs. 1 and 2, and each portion or half `will be provided with elongated slots through which the aforesaid prick pins 111-. pass.

A. scale 17 will preferably be used in connection with each prick pin 14, for convenience in adjusting the same.

` In a. practical use of the appliance, the prick points 14 are adjusted by their associated thumb nuts 16, to the vertical spaced relation which exists between the centers of the key and knob shank holes of the lock which is to be applied to the door. A like adjustment is effected of said points 14, by the adjusting screw 5, to the horizontal relation which exists between the front edge of the lock and the above mentioned centers of the key and knob shank holes of the lock.` The gage plate 7 `is also adjusted laterally` by means of the elongated slots and clamping screws 9, 10, to cause one edge of the plate to extend beyond the body `of the appliance, a distance equal to one-half the thickness of the door. Vith such adjustments effected, the overlapping gage plate 7 Having thus fully described my said invention, what l claim as new and desire to secure by Letters Patent, is

l. In a lock gage, the combination of a pair of members slidingly connected together, means for adjusting said members in relation to each other, a plate secured to the front of one member and overlapping the same, and a pair of adjustable priok pins carried by the other member, substantially as set forth.

2. ln a lock gage, the combination of a ypair of members slidingly connected together, a screw-shaft associated with said. members and adapted to effect an adjustment between said members, a gage plate secured to the front of one member and over lapping the same, and a pair of adjustable prick pins carried by the other member, substantially as set forth.

3. In a lock gage, the combination of a pair of members slidingly connected together, means for adjusting said members in relation to each other a transversely adjustable gage plate secured to the front of one member and overlapping the saine, and a pair of adjustable prick pins carried by the other member, substantially as set forth.

4. In a lock gage, the combination of a pair of members slidingly connected t0- gether, means for adjusting said members in relationto each other, a gage plate secured to the front of one member and overlapping the same, a pair of heads slidingly mounted in the other member of the gage and carrying prick pins on their Opposite sides, and means for. effecting vertical adjustments of said heads, substantially as set forth.

\ 5. n a look gage, the combination of a pair of members slidingly connected together, means for adjusting said members in relation to each other, a gage plate secured to the front of one member and overlapping the same, a pair of heads slidingly mounted in the other member of the gage and provided With prick pins on their opposite sides and With screw-threaded Shanks, and thumb nuts journaled in said other member and having operative engagement With said screw-threaded shanks, substantially as set forth.

Signed at Chicago, illinois, this 16th `day i of May, 1914. Y

GEORGE LEEVVORTH. Witnesses ROBERT BURNS,

NnnLs EriosoN.

Copies oi "this patent may be obtained for five centsfeach, by addressing the Commissioner of Patents,

Washington, D. C. 

